Detachable pad for means for operating sewing machine feet



Sept. 12, 1933.

DETACHABLE c. c. JOHNSON 1,926,872 PAD FOR MEANS FOR OPERATING SEWING MACHINE FEET Original Filed Nov. 27, 1931 INVENTOR WITNESSES /3 I 260/65 6. JU/UIJWZ 6. MQ/LQ-ZQQ ATT.ORNEY Patented Sept. 12; 1933 entrees are DETACHABLE PAD Fen MEANS For; OPER- ATENG sewlNc MACHINE FEET Gharles Johnson, Ponghkeepsie, N. Y.

Application November 27, 1931; Serial No.

577,683. Renewed August 9, 1933.

i'ol im. (01. 74-81) An object of the invention is to provide a detachable pad for a lifter which is customarily provided for engagement by the knee of the operator for raising the foot of a sewing machine.

In operatingia sewing machine it is usually necessary for the operator to raisethe foot from twelve to twenty-five times every minute. The lifter is operated by the operators knee, so that both hands of. the operator will be free to guide the work at thefoot of the machine. With this repeated operation of the lifter by the knee of the operator, the operator becomes lame and sore, after which the lifter is sometimes banged suddenly, or more oftenithe operator will endeavor to adjust her work without raising the foot of the sewing machine, which impairs the quality of work. The detachable pad which is thc subject matter of this application avoids these objections and diiilcultiesand permits the operator to readily, and conveniently raise the foot of the sewing-machine'with her knee without injuring her knee and without damage to'her clothing. u

Other objects of the invention are to provide an attachment for a lifter for raising the foot of a sewing machine which will protect the op erator and her clothing, andwhich will increase production and the efficiency of the operator.

The attachment is so constructed that it may be conveniently removed from the. lifter to permit cf the cleansing of the attachment.

A further object of the invention is to provide ripheral flap for extending over the rim of the knee lifter and at its face a sponge rubber con-' cavepad for engagement by .the knee of the operator.

Additional objects of the invention will appear I in the following specification in which the pre- 40 ferred form of the invention is described.

In the drawing similar reference characters refer to similar parts in the several views,,,of which Figure 1 is a perspective view illustrating the manner in which the detachable pad is mounted on a foot-operated member with which a sewing machine is provided,

Figure 2 is a View of the operating member for the foot of the sewing machine showing the detachable pad mounted thereon, the detachable pad being illustrated'in section, and

, Figure 3 is a perspective View illustrating the detachable member. 7

By referring to the drawing it will be seen that r the sewing machine 5 is provided withthe usual foot which is operated by means of a shaft 6 to which an arm 7 is secured, a plate 8 being mounted on this arm 7 by which means the shaft 6 may be rocked. This plate 8 is positioned to be engaged by the knee of the operator of the sewing machine for raising the foot in a manner readily understood.

To avoid injury to the knee of the operator, which takes place when the operator engages the plate at'short periods, a pad 9 is provided which is made detachable from the plate 8, in order that the pad 9 may be removed and may be cleansed. This pad Sis manufactured in one piece of sponge rubber and has at its rear a peripheral flange it) which is spaced from the 4 body. 11 or" the pad and which extends substantially parallel with the face 12 of the body 11, so that thisperipheral flange 10, which is of rubber and which is integral with thebody 11 of the pad, may be disposed over the rim 13 of the plate. The outer face of the plates is concave and the rear of the body ll of the pad 9 is curved to conform to the curvature of the plate'8.

The face 12 of the body 11 of the pad 9 is also concave vertically and is disposed substantially parallel with the rear face of the body 11 of the 30 pad; The pad, including its body 11 and its peripheral flange 10, is manufactured of rubber, with'the flange l0 integral with the body 11 and with the body manufactured of sponge rubber and preferably the flange 10 also being manufactured of sponge rubber. t will be seen that when the knee of the operator is moved to engage a pad fora knee lifter having at its rear a pethe pad 9, the knee will pivot at the foot and the knee and the leg or the operator immediately below the knee will engage the sponge rubber pad 9, which will preventa forward or rearward movement of the knee under the influence of the parts of the sewing machine with which the footengages. This also serves to assist in stopping the sewing machine as the foot of the sewing machine'is raised.

When using the pad on the plate 8, the operator will press against the face 12 of the body I a 11 of the pad for raising the foot of the sewing 1 'machine, which will not only protect the knee of the operator, but'which will also prevent sudden shock inthe parts of the sewing machine at its foot, which weuldbe the case if there were no resilientpad between the knee of the operator and the foot of the sewing machine. There- T05 fore; not only is the sewing machine protected by the pad which hasbeen described, but the a sewing machine is operated with less noise and without wear on the parts which is the case where there is no give or resiliency between the knee tact of the knee of the operator with the said face of sponge rubber as the leg is moved with the foot as a pivot, the rubber member having at its rear a flap extending inwardly from and all around the'periphery of the member approximately parallel with the said face for disposal over the rim of a plate for lifting a foot of a sewing machine.

CHARLES C. JOHNSON. 

